A woman killer makes East Frisia unsafe. The victims are murdered in apartments. The apparently only thing in common among the murdered is their lack of tattoo. Does the murderer lift this up as a trophy, or did he do completely different things with it? – In this case, Ann Kathrin Klaasen not only hunts a psychopathic serial killer, but also tries, to save her husband Frank Weller from disaster. Weller's instinct raises the alarm. He finds evidence that his daughter's lover is the sought-after serial killer. Even if Jule declares her father paranoid and Ann Kathrin is skeptical, Weller is rock solidly convinced that he has to snatch his daughter from the clutches of a serial killer. For that he risks everything. And to make matters worse, the BKA also interferes.